code: def test_add2(self):
      test_obj1 = object()
      test_obj2 = object()
  
      self.cs.add("test_obj1", "Test object", test_obj1)
      self.cs.add("test_obj2", "Test object", test_obj2)
  
      self.assertEqual(len(self.cs), 2)
      self.assertTrue("test_obj1" in self.cs)
      self.assertTrue("test_obj2" in self.cs)
  
file_path: MONAI/tests/test_component_store.py
imports: from __future__ import annotations
  import unittest
  from monai.utils import ComponentStore
label_desc: Use image node_id 4 for calling the TestComponentStore obj's underlying member method code with example usage: obj.test_add2() without return types